That dirty look parents (OK, some parents) give a cigarette smoker blowing smoke towards their kids? Maybe those should extend to drivers of cars using conventional internal-combustion engines. Which would make for a whole lot of stink-eye. Diesel emissions have been tied to asthma and lung cancer. A former intern for the US Environmental Protection Agency has written an article saying gas-powered cars are causing far more of the world's health problems than people care to admit. In many US states, cars and trucks are the largest pollution source, and light-duty vehicle emissions can cause coughing, lung irritation, lung cancer and cardiovascular disease. Diesel emissions have been tied to asthma and lung cancer , as well. The California Air Resources Board (CARB) says more than 9,000 Californians are killed each year from automobile and truck pollution. In the UK, vehicle...